Quality-assurance tests of five Y-12 Kevlar-49 spools used to fabricate strands and reliability specimens for stress-rupture tests
Abstract
An important component of the composite reliability program is the assurance of quality of Kevlar 49, 380-denier yarn and epoxy-impregnated yarn. This yarn, which is used in the fabrication of W-82 components from Kevlar 49/epoxy composites, is also formed into test specimens for long-term, stress-rupture studies and reliability studies. The QA work covered in this report encompasses preparation of impregnated-yarn specimens, examination of the yarn itself and individual fibers therefrom, tensile testing of bare and impregnated yarns and heat-degraded yarns. The yarn samples were all drawn from spools of 380-denier Kevlar 49 shipped to LLNL from Y-12. The resin matrix is an amine-hardened epoxy with low viscosity and long pot life, intended for filament winding. The components are Dow epoxy resin (DER) 332 and Jeffamine T-403 triamine hardener. The stoichiometric combining ratio, which we used in our work, is 100 parts by weight resin to 44 parts hardener. Quality-assurance testing not only verifies that the yarns actually meet the manufacturer's specifications, but also provides data on the relationships between fiber characteristics and the lifetime reliability of fabricated items.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab., CA (USA)
- OSTI Identifier:
- 7120078
- Report Number(s):
- UCID-20078
ON: DE84012373
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; ARAMIDS; QUALITY ASSURANCE; COMPOSITE MATERIALS; ELONGATION; FILAMENTS; MATRIX MATERIALS; MECHANICAL PROPERTIES; RESINS; MATERIALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PETROCHEMICALS; PETROLEUM PRODUCTS; PLASTICS; POLYMERS; SYNTHETIC MATERIALS; 360300* - Composite Materials- (-1987)
Citation Formats
Caley, L E, Ambalal, P K, Carley, J F, Ford, T S, Moore, R L, Noecker, D J, Ross, M E, Sherry, R J, and Yoshiyama, J M. Quality-assurance tests of five Y-12 Kevlar-49 spools used to fabricate strands and reliability specimens for stress-rupture tests. United States: N. p., 1984.
Web.
Caley, L E, Ambalal, P K, Carley, J F, Ford, T S, Moore, R L, Noecker, D J, Ross, M E, Sherry, R J, & Yoshiyama, J M. Quality-assurance tests of five Y-12 Kevlar-49 spools used to fabricate strands and reliability specimens for stress-rupture tests. United States.
Caley, L E, Ambalal, P K, Carley, J F, Ford, T S, Moore, R L, Noecker, D J, Ross, M E, Sherry, R J, and Yoshiyama, J M. 1984.
"Quality-assurance tests of five Y-12 Kevlar-49 spools used to fabricate strands and reliability specimens for stress-rupture tests". United States.
@article{osti_7120078,
title = {Quality-assurance tests of five Y-12 Kevlar-49 spools used to fabricate strands and reliability specimens for stress-rupture tests},
author = {Caley, L E and Ambalal, P K and Carley, J F and Ford, T S and Moore, R L and Noecker, D J and Ross, M E and Sherry, R J and Yoshiyama, J M},
abstractNote = {An important component of the composite reliability program is the assurance of quality of Kevlar 49, 380-denier yarn and epoxy-impregnated yarn. This yarn, which is used in the fabrication of W-82 components from Kevlar 49/epoxy composites, is also formed into test specimens for long-term, stress-rupture studies and reliability studies. The QA work covered in this report encompasses preparation of impregnated-yarn specimens, examination of the yarn itself and individual fibers therefrom, tensile testing of bare and impregnated yarns and heat-degraded yarns. The yarn samples were all drawn from spools of 380-denier Kevlar 49 shipped to LLNL from Y-12. The resin matrix is an amine-hardened epoxy with low viscosity and long pot life, intended for filament winding. The components are Dow epoxy resin (DER) 332 and Jeffamine T-403 triamine hardener. The stoichiometric combining ratio, which we used in our work, is 100 parts by weight resin to 44 parts hardener. Quality-assurance testing not only verifies that the yarns actually meet the manufacturer's specifications, but also provides data on the relationships between fiber characteristics and the lifetime reliability of fabricated items.},
doi = {},
url = {https://www.osti.gov/biblio/7120078},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 07 00:00:00 EDT 1984},
month = {Mon May 07 00:00:00 EDT 1984}
}